Improvement in printers  chases



' E. ALLEN.

Printers Chase.

Patented July 16,1872.

UNITED STATES PATENT OFFICE.

EDWIN ALLEN, OF N ORWICH, CONNECTICUT, ASSIGNOR TO THE ALLENMANUFACTURING COMPANY, OF SAME PLACE.

IIPROVEMENT IN PRINTERS CHASES.

Specification forming part of Letters Patent No. 129,079, dated July 16,1872.

Specification of an Attachment for Printers Ohases, invented by EDWINALLEN, of Norwich, in the county of New London and State of Connecticut.

This invention is designed for chases to be used in cylinder-presses,and its object is to obviate the slurring of the sheet in printing byits dragging over the last line of the form. To this end it consists ina lifter attached to the chase, and actuated by a spring to lift orsupport the rear end of the sheet, as, after the impression has beencompleted, the said end passes out from between the cylinder and form.It is applicable with-more especial advantage in printing on stiff paperor cards, the tendency of which is to leave the cylinder when theimpression is complete.

In the accompanying drawing, Figure 1 is a top or face View of a chasehaving the at- 'tachment applied. Fig. 2 is a side view of the same, andFig 3 is a transverse section thereof.

Similarletters of reference indicate corresponding parts in all theiigures.

A is the chase, which may be of the ordinary or any suitableconstruction. 1n those sides that come parallel with the planes ofrotation of the cylinder when the chase is in place in the press thereare longitudinal grooves a a., which receive tongues on sliding blocks BB, which are longitudinally slotted throughout a portion of theirlength, as shown at t t in Fig. 2, for the passage through them ofclamping-screws C, which screw into tapped holes in the sides of thechase, and thereby secure the blocks thereto, the slots t t providingfor the adjustment of the blocks in the chase. D lis the lifter,consisting of a bar which is straight for a length equal to the width ofthe chase, but has its ends bent at `right angles to form arms, throughwhich it is pivoted by screws s s to the blocks B B. This lifter, whichextends across the face of the form, has provided upon its upper side,over the sides of the chase, two projections,

. b b. E is a spring, which is rigidly secured at one end tothe top ofone of the blocks or carriers B B, so that the other end, which is free,bears against the under side of the lifter D, and exerts a constanttendency to raise or hold it up.

In printing with cylinder-presses, the sheet or card to be printed beingonly secured to the cylinder at the end which rst comes in contact withthe form, the other end in passing over the form is apt, especially whenthe sheet is thick, to drop away from the cylinder and drag over thelast line or rear end of the form, and so become slurred. This will beentirely obviatcd by my invention, as follows: After the form is made upthe clamping-screws are loosened, and the blocks B B are adjusted sothat the body ormain portion of the lifter D extends over that Tportionof the chase immediately in rear of the last line of type or rea-r edgeof the form, and the form is then placed in the press. As the formpasses under the cylinder H, and the cylinder by its y rotationbringsthe rear portion of the sheet over the form, the said portion isreceived upon the lifter, which extends across the chase and holds thesaid portion of the sheet up to the cylinder, and prevents it fromdragging on the form; and, as the latter continues to move forward, thelifter is depressed by the cylinder so as to pass under it, as seen inFig. 3. The inking of the operating portion of the lifter is preventedby means of the two projections b b, which, being so much higher thanthe operating portion between them, present themselves in contact withthe linking-rollers during the operation of the latter, and so producethe depression of the operating portion of the lifter--that is to say,the portion which acts upon the paper Abeyond the reach of the inkedsurface of the rollers.

Claims.

. l. A lifter constructed and applied to a chase and operated by aspring, substantially as and for the purpose herein described.

2. The combination of the lifter D, adjustable blocks B B, screws C C,and spring E, the Whole arranged upon the chase, and operatingsubstantially as and for the purpose herein set forth.

EDWIN ALLEN.

Witnesses v FRED. HAYNEs, R. E. BABEAU.

